Key to the genus Eulophia group F
Description:
Sepals and petals of similar length and width, if sepals longer then flowers not opening widely.
| 1 | Leaves well developed at flowering time | 2 |
| 1a | Leaves absent or just starting to develop at flowering time, or leaves vestigial | 7 |
| 2 | Sepals less than 7 mm long; lip with 3 ridges, without papillae | Eulophia tenella |
| 2a | Sepals more than 9 mm long; mid-lobe of lip with papillae | 3 |
| 3 | Lip with a central callus of 2 subquadrate, flap-like ridges | Eulophia alta |
| 3a | Lip lacking such a callus | 4 |
| 4 | Lateral sepals attached to column-foot, distinctly below insertion of ovary | Eulophia tanganyikensis |
| 4a | Lateral sepals not as above | 5 |
| 5 | Sepals green or bronze, petals white; lip green and purple with 3–5 rows of short papillae | Eulophia stachyodes |
| 5a | Flowers green; lip mid-lobe purple or purple and white, with many long papillae | 6 |
| 6 | Dorsal sepal 12–20 mm long; spur 2–2.5 mm long, conical | Eulophia elegans |
| 6a | Dorsal sepal 9–12 mm long; spur 1.5–3 mm long, cylindrical, incurved | Eulophia kyimbilae |
| 7 | Midlobe of lip lacking papillae | 8 |
| 7a | Midlobe of lip with papillae | 9 |
| 8 | Flowers showy, mauve-pink; petals erect, 18–23 mm long | Eulophia livingstoneana |
| 8a | Flowers straw-coloured, or brownish with a violet lip; petals porrect, 6–8 mm long | Eulophia chilangensis |
| 9 | Spur 5–6 mm long, slender, straight, parallel to ovary | Eulophia obscura |
| 9a | Spur not as above | 10 |
| 10 | Flowers yellow and purple; spur 3–5 mm long, decurved; perennating organs pseudobulbous, covered with brown sheaths, mostly subterranean but usually with tip above ground | Eulophia monile |
| 10a | Flowers greenish or green-brown; spur 1.5–3 mm long, incurved, inflated at apex; perennating organs tuberous, subterranean | Eulophia monile syn. Eulophia norlindhii |
World Checklist of Monocotyledons. The Board of Trustees of the Royal Botanic Gardens, Kew. Published on the Internet; http://www.kew.org/wcsp/monocots/ accessed 12/08/2019